As we come to Genesis 4, we arrive at one of the best-known accounts in the Bible—the story of Cain and Abel. Most people remember it as the account of the first murder, but there is much more going on than that. The New Testament sheds additional light on these two brothers, and when we compare Scripture with Scripture, we begin to understand why God accepted one offering while rejecting the other.

Eve’s Remark After Cain’s Birth

Genesis opens the chapter by saying,

“Now the man knew his wife Eve, and she conceived and gave birth to Cain, and she said, ‘I have gotten a man with the help of Yahweh.’ And again she gave birth to his brother Abel.”

Before moving into the story itself, there is an interesting detail in Eve’s statement that is worth noticing.

Most English translations read something like, “I have gotten a man with the help of the Lord,” or “I have gotten a man from the Lord.” Those are reasonable translations, but the Hebrew is actually more difficult than that.

If we translated the words as literally as possible, Eve’s statement would simply read, “I have acquired a man, Yahweh.”

Immediately we wonder what she meant. Did she somehow think she had given birth to Yahweh? That certainly cannot be correct. Was she saying she had received a man from Yahweh? Or that she had obtained a man with Yahweh’s help? Those are exactly the kinds of decisions translators have to make.

It reminds us that translation is not always as straightforward as we sometimes imagine. The original Hebrew contained no capital letters, no punctuation, no commas or periods, no spaces between words, and originally not even written vowels. Translators must study the language carefully and determine how the words fit together in light of the rest of Scripture.

We cannot know with certainty exactly what Eve intended by her statement. Most likely she was expressing gratitude that the Lord had enabled her to bear a son. That seems to fit both the context and the rest of Scripture, even though the Hebrew wording itself leaves us with some unanswered questions.

Two Brothers, Two Occupations

The account then introduces the occupations of the two brothers. Cain became a cultivator of the ground, while Abel became a keeper of flocks.

There is an interesting connection with Adam here. Earlier we learned that Adam’s name is closely related to the Hebrew word for “ground.” Cain’s occupation was literally to work the adamah, the ground. He raised crops while Abel cared for sheep. That connection between Adam and the ground continues to appear throughout the chapter.

Why Did They Bring Offerings?

The story then tells us that, in the course of time, both brothers brought offerings to the Lord.

That raises an important question. Why were they bringing offerings at all?

Genesis never explicitly tells us that God commanded them to do so. Since both brothers brought offerings, it seems reasonable to conclude that God must have instructed them in some way. Yet the passage itself never actually says so, and we should be careful not to claim more than the text tells us.

Cain brought an offering from the fruit of the ground. Unlike the later requirements under the Mosaic Law, Genesis does not say that he brought the firstfruits or the best of his harvest. It simply says that he brought some of the fruit of the ground.

Abel’s offering is described differently. He brought “the firstborn of his flock and of their fat portions.”

Even at this early point in Scripture, we notice that Abel brought the firstborn and the choicest portions. Later in the Old Testament, the fat portions repeatedly represent the best of the sacrifice offered to God.

Still, that alone does not fully explain why God accepted Abel’s offering while rejecting Cain’s. To understand that, we need to let Scripture interpret Scripture.

Scripture Explains Scripture

Whenever we encounter a difficult passage, the best commentary on Scripture is Scripture itself.

The first place we should turn is Hebrews 11.

Hebrews 11:4 says,

“By faith Abel offered to God a better sacrifice than Cain, through which he was approved as being righteous, God approving his gifts.”

Immediately we learn something Genesis has not yet told us. Abel offered his sacrifice by faith.

That detail is significant because Hebrews 11 is the great chapter on faith. Abel believed God. His offering was the expression of genuine faith, and because of that God declared him righteous and accepted his gift.

The passage says nothing similar about Cain.

We are not specifically told that Cain lacked faith, but all of the emphasis falls upon Abel’s faith. Hebrews presents that as the distinguishing difference between the two brothers. Abel was approved as righteous because righteousness comes by faith, and God approved both the man and the offering that proceeded from that faith.

What the New Testament Says About Cain

The New Testament takes us even farther.

In 1 John 3 we read,

“This is the message which you have heard from the beginning, that we should love one another; not as Cain.”

Cain immediately becomes the opposite example of the love believers are to have for one another. John then tells us something we never would have known from Genesis alone.

Cain “was of the wicked one.”

That is a remarkable statement.

Cain certainly believed God existed. God spoke directly with him, and in just a few verses God and Cain will carry on a lengthy conversation. His problem was not that he denied God’s existence. There are many people who honestly believe God exists while never placing genuine faith in Him.

John continues,

“…because his deeds were evil, and his brother’s were righteous.”

According to Scripture, Cain himself was an evil man. It may well be that his evil sprang from unbelief, because elsewhere Scripture speaks of an evil heart of unbelief. A person may perform many outwardly good deeds, care for others, and appear morally upright, yet if that person refuses to believe God, Scripture still describes that heart as evil.

The issue, then, was much deeper than simply bringing vegetables instead of a lamb.

The Way of Cain

Jude reinforces the same picture.

Speaking about ungodly men who had crept into the church, Jude says, “They have gone the way of Cain.” He places Cain alongside Balaam and Korah, two other well-known examples of rebellion against God.

When we put Hebrews 11, 1 John 3, and Jude together, we discover that Cain represents much more than someone who happened to bring the wrong kind of sacrifice. He represents an unbelieving heart that outwardly acknowledged God while inwardly remained opposed to Him.

Abel, on the other hand, stands as an example of genuine faith.

That is the real heart of the story. It explains why God accepted one offering and rejected the other.

God’s Warning to Cain

After God rejected Cain’s offering, Genesis says that Cain became very angry and his countenance fell. That is often what happens when a person is determined to continue in sin. Rather than responding with humility, he becomes angry when confronted.

Just as God questioned Adam after the Fall, He now begins asking Cain questions.

“Why are you angry? And why has your countenance fallen?”

Then God gives Cain a warning: “If you do well, will not your countenance be lifted up? And if you do not do well, sin is lying at the door; and its desire is for you, but you must rule over it.”

The wording is interesting because it echoes the language used earlier in Genesis when God spoke to Adam and Eve. Sin is pictured as something waiting at the door, ready to take control. Its desire is for Cain, but God tells him that he must rule over it.

I cannot help thinking of Paul’s words in Romans that sin shall not have dominion over believers. Under the new covenant, because of Christ’s work, sin has lost its mastery over those who belong to Him. Here, long before that covenant was established, God still calls Cain to master the sin that is pressing against him.

In a sense, God is giving Cain an opportunity. He is warning him before the greater sin takes place. It is much like a parent correcting a child before the situation gets worse. Sometimes the child responds, and the matter is over. Sometimes the child continues to push the line. Cain is not about to listen to God.

The First Murder

Genesis simply says,

“Then Cain spoke to Abel his brother.”

I have always found that statement interesting. We are not told what Cain said. Perhaps the conversation took place before they entered the field. Perhaps he simply persuaded Abel to go with him. We do not know. The text leaves that part of the story unstated.

What we do know is that they ended up together in the field.

Then Cain rose up against his brother Abel and killed him.

The first murder in history was not the result of a momentary disagreement over an offering. It grew out of an unbelieving heart that had already rejected God’s warning. Cain had been confronted, given an opportunity to do what was right, and warned that sin was waiting to master him. Instead of ruling over sin, he yielded to it, and the result was the murder of his own brother.

The Judgment of Cain

After Cain murdered his brother, the Lord came to him once again. Just as God had questioned Adam after the Fall, He now questioned Cain. The questions were not asked because God lacked information. He already knew what had happened. Instead, the questions exposed Cain’s heart and gave him the opportunity to acknowledge his sin.

“Where Is Abel Your Brother?”

The Lord asked, “Where is Abel your brother?”

Cain answered, “I do not know. Am I my brother’s keeper?”

His reply is as revealing as the murder itself. Rather than confessing what he had done, he denied any responsibility for his brother. It is the familiar response of a guilty heart trying to avoid accountability. Someone breaks the vase and immediately says, “I don’t know who did it.” Cain’s answer has that same spirit. “Why should I know where he is? Am I responsible for keeping track of him?”

Instead of admitting his guilt, he attempted to shift the focus away from himself.

The Lord then replied,

“What have you done? The voice of your brother’s blood is crying to Me from the ground.”

That is remarkable language. Abel’s blood is pictured as crying out from the ground itself. The “crying” here is a yelling plea for revenge on the evil that was done. In Scripture when that word is used, God responds. It was a similar cry from the captive Israelites that God responded to with the Passover. The ground had received the blood that Cain had shed, and God speaks of it almost as though the earth itself were bearing witness to the crime.

Cursed from the Ground

The connection between Cain and the ground continues throughout God’s judgment.

Earlier we noticed that Cain’s occupation was to cultivate the adamah, the ground. Now God says,

“Now cursed are you from the ground, which has opened its mouth to receive your brother’s blood from your hand.”

The ground is personified. It is pictured as opening its mouth to receive Abel’s blood.

There is also an obvious parallel with Adam. Adam worked the ground, and after the Fall the ground would yield its produce only through painful labor. Cain now receives an even more severe judgment.

God tells him,

“When you cultivate the ground, it will no longer yield its strength to you.”

The very thing that had been Cain’s occupation would no longer respond to him. The ground he had worked, and from which he had brought his offering, would no longer produce as it once had.

God continues,

“You will be a vagrant and a wanderer on the earth.”

A vagrant is someone who roams from place to place without stability. The idea of a wanderer carries the thought of aimlessness and homelessness. Cain would no longer enjoy the settled life of cultivating his own land. Instead, he would become a restless wanderer with no permanent place to call home.

Cain’s Response

Cain did not argue that he was innocent. Instead, he cried out,

“My punishment is too great for me to bear.”

He understood exactly what God had said.

Then he continued,

“Behold, You have driven me this day from the face of the ground; and from Your face I will be hidden.”

Those words are especially sobering.

Throughout this account, Cain has been speaking directly with Yahweh. He has heard God’s questions, God’s warnings, and now God’s judgment. He realizes those conversations are coming to an end.

“You have driven me…from Your face I will be hidden.”

Cain understands that his fellowship with the Lord has been broken. He accepts God’s declaration that he will become a vagrant and a wanderer because God has said it will be so.

Then another concern enters his mind. “Whoever finds me will kill me.”

I find that interesting.

Cain had just murdered his own brother, yet now he feared that someone else would kill him. It reminds me of how often those who commit acts of violence suddenly become very concerned for their own safety when justice begins to catch up with them. Cain, who had shown no mercy to Abel, now desperately wanted mercy shown to himself.

The Mark of Cain

The Lord answered Cain’s fear with another declaration.

“Therefore whoever kills Cain, vengeance will be taken on him sevenfold.”

In other words, anyone who took Cain’s life would face an even greater judgment from God.

Then Genesis says,

“Yahweh appointed a sign for Cain, so that no one finding him would slay him.”

The text never tells us what that sign was.

Over the years many ideas have been suggested. Some ancient Jewish teachers even proposed that it was some sort of physical mark or horn-like feature. Scripture itself, however, says nothing about the nature of the sign, so we should not go beyond what the Bible reveals.

Whatever the sign was, it identified Cain in such a way that those who encountered him would know he was under God’s protection.

Exactly how that would prevent someone from attacking him, we are not told. Perhaps those who saw the sign also understood its meaning and respected the judgment God had pronounced. The text simply leaves the matter there.

Cain Leaves the Presence of the Lord

The section closes with a brief but solemn statement:

“Then Cain went out from the presence of Yahweh and settled in the land of Nod, east of Eden.”

Earlier, Eden itself had been to the east. Now Cain travels even farther east.

That geographical detail becomes significant as Genesis continues, because later events—including the Tower of Babel—also take place farther east in that same general region. This, of course, is before the Flood, so the geography of rivers and the landscape itself may not have been exactly as we know it today.

More important than the direction Cain traveled is the statement that he went out from the presence of Yahweh.

That is the tragic conclusion to this part of the story. The man who had spoken directly with God, who had received both warning and opportunity to repent, now departs from the Lord’s presence under divine judgment.

Cain’s Descendants and the Growth of Humanity

After recording Cain’s departure from the presence of the Lord, Genesis turns our attention to his descendants. At first glance this genealogy may seem like little more than a list of unfamiliar names, but it helps answer questions that naturally arise as we read the account.

One of the first questions people ask is, “Where did Cain’s wife come from?” The genealogy begins to answer that question by showing that the population of the earth was already growing far beyond Adam, Eve, and their immediate family.

Cain Builds a City

Genesis says,

“Cain knew his wife, and she conceived and gave birth to Enoch; and he built a city, and called the name of the city Enoch, after the name of his son.”

It is worth noticing that Cain himself named the city after his son Enoch.

The fact that Cain built a city immediately tells us there had to be far more people living than just Adam, Eve, Cain, and Seth. It may have been a very small city by our standards, but it was certainly more than a single family living alone. The account itself points to a rapidly increasing population.

The Genealogy of Cain

Genesis then traces Cain’s descendants:

Enoch became the father of Irad, Irad the father of Mehujael, Mehujael the father of Methushael, and Methushael the father of Lamech.

Lamech marks an important point in the genealogy because several details are given about his family.

The text tells us that Lamech took two wives, Adah and Zillah. That alone distinguishes him within the genealogy, since Scripture records him as having two wives rather than one.

Adah gave birth to Jabal, who became the father of those who dwell in tents and have livestock. His brother Jubal became the father of those who play the lyre and the pipe.

Zillah gave birth to Tubal-cain, who forged implements of bronze and iron.

That statement is easy to read past, but it tells us something important about the civilization that existed before the Flood.

Working with bronze and iron is not a simple matter. Iron does not simply appear in usable form. Someone has to mine the ore, build furnaces, smelt the metal, and develop the skills necessary to fashion tools from it. Those industries were already developing long before the Flood.

This was not a primitive society with no technology. It was a developing civilization with craftsmen, herdsmen, musicians, and metalworkers.

Naamah—An Unusual Detail

One more person is mentioned almost in passing:

“The sister of Tubal-cain was Naamah.”

That may not seem significant until we remember that women are rarely named in Old Testament genealogies unless there is some special reason for doing so.

Naamah is named, yet the Bible never explains why.

Some of the ancient Jewish rabbis suggested that she eventually became Noah’s wife. Scripture itself never says that, so we should not present it as fact. It simply remains one of those interesting suggestions that has been made over the years without biblical proof.

Lamech’s Boast

The genealogy pauses briefly to record something Lamech said to his wives:

“Adah and Zillah, listen to my voice… I have killed a man for striking me, and a boy for wounding me. If Cain is avenged sevenfold, then Lamech seventy-sevenfold.”

Lamech speaks of killing both a man and a young man. We will look more carefully at that passage later, but even here we can see his attitude. He appeals to the protection God gave Cain and claims that he deserves even greater protection for himself.

The account introduces themes that will become more important as Genesis continues.

Looking at the Genealogy

In the lesson notes, I included a genealogy chart showing Cain’s descendants.

Seeing the names laid out visually helps us follow the family line from Cain through Enoch, Irad, Mehujael, Methushael, Lamech, and then to Jabal, Jubal, Tubal-cain, and Naamah.

I also included a second chart that raises an interesting question.

I asked an AI program whether Scripture ever tells us how long Cain and his descendants lived. The answer was no. Unlike the genealogy of Seth in the next chapter, Genesis never records the ages of Cain’s family.

The program suggested creating an approximate timeline by assuming that Cain’s descendants generally lived about as long as the descendants of Seth. Since Scripture does not provide those numbers, the chart is only an illustration—not biblical fact.

Still, it provides an interesting way to visualize who may have been living at the same time.

For example, if you draw a vertical line at approximately 750 years after creation, you can see which members of Cain’s family and which members of Seth’s family would likely have been alive simultaneously if their lifespans were generally comparable.

Again, that chart is only an approximation designed to help us picture the chronology. It is not something Scripture itself tells us.

How Many People Were Living?

That naturally leads to another question.

How many people could have been living before the Flood?

Many people picture only a few scattered families, but that probably was not the case.

Organizations such as Answers in Genesis have attempted to estimate population growth by making reasonable assumptions about lifespan, the average number of children per family, and the ages at which people began having children. Those assumptions are then used to model what the world’s population might have looked like before the Flood.

Depending on the assumptions that are made, the population could easily have reached into the millions—or even the billions—by the time of Noah.

Of course, those figures are only estimates. Scripture does not tell us the exact population.

Even so, those possibilities help answer questions like, “Who was Cain afraid of?” or “Who lived in the city he built?” There were likely many more people alive than we often imagine.

That also raises another interesting question. If the population had grown that large, people could not all have been living together in one small settlement. Long before the Flood they would have spread out over large areas. Exactly how far they spread, we simply are not told.

These are interesting things to think about, even though the Bible does not answer every detail. They help us picture the setting in which the events of Genesis took place without going beyond what Scripture actually says.

Looking Ahead

The chapter closes by recording the birth of Seth, whose family line will become the focus of the next section of Genesis.

Before moving there, it is helpful to remember what we have seen in Cain’s account. Genesis has shown us far more than the story of one brother killing another. Through the New Testament we discover that Cain represents an unbelieving heart that outwardly acknowledged God while inwardly opposed Him. His descendants reveal a growing civilization with cities, agriculture, music, and metallurgy, while at the same time setting the stage for the increasing corruption that will eventually lead to the judgment of the Flood. The genealogy of Seth now becomes the line that Genesis will follow as God’s redemptive plan continues.

To find handouts and other resources, go to this website and check out the contents under Session 18. Back to the Beginning – Resources | The Tuinstras